I have a pair of the N2N Ultra Skin Runner tights (see my pix) and yes I've run in them. First off, they are ok as running tights but not really functional. Like I said, I've run in them, but since they are very low rise every step you take they lower exposing the top of your butt crack. I always wear a shirt to cover that up. As far as the support goes they are ok and do the job at keeping your legs warm with a slight compression. But you run the risk of exposing yourself wearing them unless you really tighten them with the string.
Second, I have the Under Armour tight also. These are very good. Very good compression. I wear them a lot. Both in the winter and the cool in the summer. I always wear tight to run in as long as the temp is below 70 degrees. With these, if the weather is nice I don't wear a shirt.
The BEST that I've found is http://www.cw-x.com/
These are real tights made with compression and added support in mind. I got the two pair. They cost a lot more then Under Armour but I like them. These have a particular science behind their design. So you might enjoy them.